Add a sentence to 22.1.3.7: "If *print-readably* is true ... Any vector can be printed readably without signaling an error of type PRINT-NOT-READABLE if all its elements can be printed readably without signaling an error of type PRINT-NOT-READABLE."
And similarly to 22.1.3.8: "If *print-readably* is true ... Any array can be printed readably without signaling an error of type PRINT-NOT-READABLE if all its elements can be printed readably without signaling an error of type PRINT-NOT-READABLE."